This article describes the design, construction, and performance evaluation of a natural-convection, solar
dryer capable of producing dried mango slices in rural Haitian communities. A sorption isotherm was developed for the
Tommy Atkins mango variety to determine target levels of moisture content needed to achieve required levels of water
activity. The solar dryer was constructed and operated in Gainesville, Florida, during the summer of 2011. Performance
evaluation revealed cabinet temperatures between 37.0°C and 43.7°C during sunlight hours depending on airflow and
loading conditions. Damper restriction was shown to effectively control flow rates to adjust temperatures within the dryer.
Operating capacity of the dryer was 9.5 kg of fresh mango slices per 36 h, lowering the moisture content from 84.5%
(w.b.) to 10.3% (w.b.) under a continuous mode of operation. The collector efficiency, pick-up efficiency, and system
efficiency were 26.7%, 20.4%, and 25.9% respectively.
This article describes the design, construction, and performance evaluation of a natural-convection, solardryer capable of producing dried mango slices in rural Haitian communities. A sorption isotherm was developed for theTommy Atkins mango variety to determine target levels of moisture content needed to achieve required levels of wateractivity. The solar dryer was constructed and operated in Gainesville, Florida, during the summer of 2011. Performanceevaluation revealed cabinet temperatures between 37.0°C and 43.7°C during sunlight hours depending on airflow andloading conditions. Damper restriction was shown to effectively control flow rates to adjust temperatures within the dryer.Operating capacity of the dryer was 9.5 kg of fresh mango slices per 36 h, lowering the moisture content from 84.5%(w.b.) to 10.3% (w.b.) under a continuous mode of operation. The collector efficiency, pick-up efficiency, and systemefficiency were 26.7%, 20.4%, and 25.9% respectively.
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